CVE-2005-1451 in Serendipity
Summary
by MITRE
The media manager in Serendipity before 0.8 allows remote attackers to upload and execute arbitrary (1) .php or (2) .shtml files.
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Analysis
by VulDB Data Team • 07/08/2018
The vulnerability identified as CVE-2005-1451 affects the media manager component of Serendipity blogging platform versions prior to 0.8. This represents a critical security flaw that enables remote attackers to bypass authentication mechanisms and upload malicious files directly to the server. The vulnerability stems from insufficient input validation and file type checking within the media upload functionality, creating an avenue for arbitrary code execution that could compromise the entire web application infrastructure.
The technical exploitation of this vulnerability involves uploading malicious files with extensions .php or .shtml to the server through the media manager interface. These file types are particularly dangerous because .php files can execute server-side code, while .shtml files can be processed by servers that support server-side includes, potentially allowing attackers to inject malicious scripts or commands. The flaw exists due to inadequate sanitization of uploaded filenames and lack of proper MIME type validation, which allows attackers to manipulate the upload process and place executable code in directories accessible via the web server.
The operational impact of this vulnerability is severe and multifaceted. Successful exploitation enables attackers to gain persistent access to the web server, potentially leading to complete system compromise. Attackers can upload backdoor scripts, web shells, or other malicious payloads that provide ongoing access to the compromised system. This vulnerability directly violates multiple security principles including the principle of least privilege, as unauthorized users can execute code with the privileges of the web server process. The attack surface extends beyond simple code execution to include potential data exfiltration, system reconnaissance, and further network penetration activities.
From a threat modeling perspective, this vulnerability aligns with CWE-434 which addresses "Unrestricted Upload of File with Dangerous Type" and represents a classic path to remote code execution through file upload vulnerabilities. The attack pattern follows typical MITRE ATT&CK techniques including T1190 for Exploit Public-Facing Application and T1059 for Command and Scripting Interpreter, where attackers leverage the compromised upload functionality to establish persistent access. Organizations with vulnerable Serendipity installations face significant risk of being compromised for botnet recruitment, data theft, or as launch points for attacks against internal networks. The vulnerability demonstrates the critical importance of proper input validation and secure file handling practices in web applications.
Mitigation strategies should include immediate patching to Serendipity version 0.8 or later, where the media manager has been updated to properly validate file types and sanitize uploaded filenames. Administrators should implement additional security measures such as restricting upload permissions to authenticated users only, implementing strict file type whitelisting, and configuring web server rules to prevent execution of uploaded files in web-accessible directories. Network-level protections including web application firewalls and intrusion detection systems can provide additional layers of defense. Regular security audits and vulnerability assessments should be conducted to identify similar flaws in other components of the web application stack, as this vulnerability represents a common pattern in legacy web applications that may contain similar file upload security weaknesses.